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Csekő G, Nyitrai B, Horváth AK. Kinetics and Mechanism of Selenium(IV) Oxidation by Aqueous Bromine Solution. ACS OMEGA 2023; 8:15769-15780. [PMID: 37151533 PMCID: PMC10157880 DOI: 10.1021/acsomega.3c01497] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 04/11/2023] [Indexed: 05/09/2023]
Abstract
The bromine-selenite reaction at strongly acidic conditions was investigated by monitoring the absorbance-time traces at the isosbestic point of the bromine-tribromide system at a constant ionic strength (0.5 M adjusted by sodium perchlorate) and temperature. Despite the simplicity of the stoichiometry, the kinetics was found to be very complex. Although the formal kinetic orders of the reactants bromine and selenite are strictly 1, that of the hydrogen ion varies from -2 to less than -3 and notably depends on the initial bromide concentration as well. The bromide ion also inhibits the reaction, making the whole system as a sound example of efficient autoinhibition. We have clearly shown that the inhibitory effect of the bromide ion cannot be explained quantitatively by either exclusively considering the unreactivity of the tribromide ion over elemental bromine or driving the reaction via hypobromous acid formed from the well-known hydrolysis of bromine in aqueous solutions. Instead of that, bromonium ion transfer initiating equilibrium is suggested between the selenium(IV) and bromine species to produce bromide ion and SeO3Br- followed by the hydrolysis of this short-lived intermediate. This hydrolytic transformation was found to be catalytic with respect to hydroxide and bromide ions as well. We have also demonstrated that, among the wide variety of selenium species present in the acidic aqueous solution, the best result can be obtained by considering HSeO3 - as the kinetically active species toward bromine. The proposed mechanism containing 10 acid-base equilibria with known equilibrium constants, the above-mentioned initiating equilibrium, and the hydrolysis of SeO3Br- is able to fit all 49 kinetic absorbance-traces simultaneously, taking into account properly the most important characteristics of the measured data at strongly acidic conditions. Furthermore, this kinetic model was further extended by the direct reactions of hypobromous acid with selenium(IV) species suggested previously with reasonably modified rate coefficients to describe the pH dependence of the apparent second-order rate coefficients over the pH = 1-13 range, providing a useful tool to predict more accurately the kinetic behavior of selenium(IV) species in water treatment process conditions.
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Grishaev VY, Siidra OI, Markovski MR, Charkin DO, Omelchenko TA, Nazarchuk EV. Synthesis and crystal structure of two novel polymorphs of (NaCl)[Cu(HSeO 3) 2]: a further contribution to the family of layered copper hydrogen selenites. Z KRIST-CRYST MATER 2023. [DOI: 10.1515/zkri-2023-0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
Abstract
Crystals of two new polymorphic forms of the known compound (NaCl)[Cu(HSeO3)2], which we term polymorphs II and III, were formed after a ca. one-year dwelling of a crystalline precipitate under mother liquor and upon crystallization in the presence of K+, respectively. Both structures belong to the “layered copper hydroselenite” family. The polymorph II is a structural analog of (KCl)[Cu(HSeO3)2] with a fully ordered Na+ site; the main difference concerns the environment of Cu2+ which is more regular in (NaCl)[Cu(HSeO3)2]-II. In contrast to some expectations, crystallization from solutions containing KCl. NaCl, CuCl2, and H2SeO3 upon evaporation does not result in formation of mixed (Na1−x
K
x
Cl)[Cu(HSeO3)2] crystals, but rather in a separate crystallization of (KCl)[Cu(HSeO3)2] and (NaCl)[Cu(HSeO3)2]-III which exhibits a complex structure with four ordered and one disordered Na+ sites. It is possible that longer crystallization times enhance formation of ordered structures.
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Lee J, Mathur S, Shen S, Wu J, Chen J. MoSe 2 Nanoflowers for Highly Efficient Industrial Wastewater Treatment with Zero Discharge. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2102857. [PMID: 34693662 PMCID: PMC8655190 DOI: 10.1002/advs.202102857] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/16/2021] [Indexed: 05/31/2023]
Abstract
Water pollution is one of the leading causes of death and disease worldwide, yet mitigating it remains a challenge. This paper presents an efficient new strategy for the processing of wastewater utilizing an accessible redox reaction with MoSe2 nanoflowers, which shows a strong oxidizing ability and permits the decomposition of dye molecules in dark environments without the need for an external power source. This reaction can treat wastewater at a decomposition rate above 0.077 min-1 , even when interacting with organic pollutants at concentrations up to 1500 ppm. Theoretical calculations by Dmol3 simulation elucidates that the reactions proceed spontaneously, and the kinetic constant (kobs ) for this redox reaction with 10 ppm RhB dye is 0.53 min-1 , which is 65 times faster than the titanium dioxide photocatalytic wastewater treatment. More importantly, the residual waste solution can be further utilized as a precursor to reconstruct the MoSe2 nanoflowers. To demonstrate the effectiveness and reusability, the treated effluent is directly used as the sole source of irrigated water for plants with no adverse effect. This method offers an eco-friendly and more accessible way to treat industrial wastewater with zero-discharge.
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Affiliation(s)
- Jyun‐Ting Lee
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu300Taiwan
| | - Shaurya Mathur
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCA90095USA
| | - Sophia Shen
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCA90095USA
| | - Jyh‐Ming Wu
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu300Taiwan
- High Entropy Materials CenterNational Tsing Hua UniversityHsinchu300Taiwan
| | - Jun Chen
- Department of BioengineeringUniversity of California, Los AngelesLos AngelesCA90095USA
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Green Synthesis of Selenium Nanoparticles by Cyanobacterium Spirulina platensis (abdf2224): Cultivation Condition Quality Controls. BIOMED RESEARCH INTERNATIONAL 2021; 2021:6635297. [PMID: 34195275 PMCID: PMC8181098 DOI: 10.1155/2021/6635297] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 05/05/2021] [Accepted: 05/16/2021] [Indexed: 12/20/2022]
Abstract
Selenium nanoparticles (SeNPs) are well-known bioactive compounds. Various chemical and biological methods have been applied to SeNP synthesis. Spirulina platensis is a widely used blue-green microalgae in various industries. In this study, the biosynthesis of SeNPs using sodium selenite and Spirulina platens has been developed. The SeNP synthesis was performed at different cultivation condition including pH and illumination schedule variation. The SeNPs were characterized by FT-IR, XRD, size, and zeta potential measurements, and the antioxidant activities of selected SeNPs were evaluated by DPPH and FRAP assays. FT-IR analysis showed the production of SeNPs. The 12 h dark/12 h light cycles and continuous light exposure at pH 5 led to the production of stable SeNPs with sizes of 145 ± 6 and 171 ± 13 nm, respectively. Antioxidant activity of selected SeNPs was higher than sodium selenite. It seems that green synthesis is a safe method to produce SeNPs as well as a convenient method to scale-up this production.
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Raman Microspectroscopic Analysis of Selenium Bioaccumulation by Green Alga Chlorella vulgaris. BIOSENSORS-BASEL 2021; 11:bios11040115. [PMID: 33920129 PMCID: PMC8069876 DOI: 10.3390/bios11040115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 01/06/2023]
Abstract
Selenium (Se) is an element with many commercial applications as well as an essential micronutrient. Dietary Se has antioxidant properties and it is known to play a role in cancer prevention. However, the general population often suffers from Se deficiency. Green algae, such as Chlorella vulgaris, cultivated in Se-enriched environment may be used as a food supplement to provide adequate levels of Se. We used Raman microspectroscopy (RS) for fast, reliable, and non-destructive measurement of Se concentration in living algal cells. We employed inductively coupled plasma-mass spectrometry as a reference method to RS and we found a substantial correlation between the Raman signal intensity at 252 cm−1 and total Se concentration in the studied cells. We used RS to assess the uptake of Se by living and inactivated algae and demonstrated the necessity of active cellular transport for Se accumulation. Additionally, we observed the intracellular Se being transformed into an insoluble elemental form, which we further supported by the energy-dispersive X-ray spectroscopy imaging.
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Ghosh S, Tudu G, Mondal A, Ganguli S, Inta HR, Mahalingam V. Inception of Co3O4 as Microstructural Support to Promote Alkaline Oxygen Evolution Reaction for Co0.85Se/Co9Se8 Network. Inorg Chem 2020; 59:17326-17339. [PMID: 33213153 DOI: 10.1021/acs.inorgchem.0c02618] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Sourav Ghosh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal 741246, India
| | - Gouri Tudu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal 741246, India
| | - Ayan Mondal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal 741246, India
| | - Sagar Ganguli
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal 741246, India
| | - Harish Reddy Inta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal 741246, India
| | - Venkataramanan Mahalingam
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal 741246, India
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Geng R, Wang W, Din Z, Luo D, He B, Zhang W, Liang J, Li P, Fan Q. Exploring sorption behaviors of Se(IV) and Se(VI) on Beishan granite: Batch, ATR-FTIR, and XPS investigations. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113029] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Markovski MR, Siidra OI, Charkin DO, Vladimirova VA, Tsirlin AA, Grishaev VY. Li 2(Se 2O 5)(H 2O) 1.5·CuCl 2, a salt-inclusion diselenite structurally based on tetranuclear Li 4 complexes. Dalton Trans 2020; 49:7790-7795. [DOI: 10.1039/d0dt01260b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new lithium copper diselenite chloride hydrate, Li2Se2O5(H2O)1.5·CuCl2, was prepared from aqueous solution.
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Affiliation(s)
- Mishel R. Markovski
- Department of Crystallography
- St. Petersburg State University
- 199034 St. Petersburg
- Russia
| | - Oleg I. Siidra
- Department of Crystallography
- St. Petersburg State University
- 199034 St. Petersburg
- Russia
- Institute of Silicate Chemistry
| | | | | | - Alexander A. Tsirlin
- Experimental Physics VI
- Center for Electronic Correlations and Magnetism
- Institute of Physics
- University of Augsburg
- 86135 Augsburg
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Markovski MR, Charkin DO, Siidra OI, Nekrasova DO. Copper hydroselenite nitrates (A
+NO3)
n
[Cu(HSeO3)2] (A=Rb+, Cs+ and Tl+, n=1, 2) related to Ruddlesden – Popper phases. Z KRIST-CRYST MATER 2019. [DOI: 10.1515/zkri-2019-0036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Three new layered copper hydrogen selenite nitrates, (ANO3)[Cu(HSeO3)2] (A = Cs, and Tl), and (RbNO3)2[Cu(HSeO3)2] have been prepared via isothermal evaporation of concentrated nitric acid solutions. The Tl and Cs compounds adopt a motif related to previously known (NH4Cl)[Cu(HSeO3)2]; the structure of the Rb compound represents a new structure type. The structures of (ANO3)[Cu(HSeO3)2] (A = Cs, Tl), (RbNO3)2[Cu(HSeO3)2], and (NH4NO3)3[Cu(HSeO3)2] form a unique homological series distantly related to Ruddlesden – Popper series of layered perovskites.
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Affiliation(s)
- Mishel R. Markovski
- Department of Crystallography , St. Petersburg State University , University Emb. 7/9 , 199034 St. Petersburg , Russia
| | - Dmitri O. Charkin
- Department of Chemistry , Moscow State University , Leninskie Gory 1 , 119991 Moscow , Russia
| | - Oleg I. Siidra
- Department of Crystallography , St. Petersburg State University , University Emb. 7/9 , 199034 St. Petersburg , Russia
- Kola Science Center, Russian Academy of Sciences , Apatity , 184200 Murmansk Region , Russia
| | - Diana O. Nekrasova
- Department of Crystallography , St. Petersburg State University , University Emb. 7/9 , 199034 St. Petersburg , Russia
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Mayordomo N, Foerstendorf H, Lützenkirchen J, Heim K, Weiss S, Alonso U, Missana T, Schmeide K, Jordan N. Selenium(IV) Sorption Onto γ-Al 2O 3: A Consistent Description of the Surface Speciation by Spectroscopy and Thermodynamic Modeling. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:581-588. [PMID: 29231722 DOI: 10.1021/acs.est.7b04546] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The sorption processes of Se(IV) onto γ-Al2O3 were studied by in situ Infrared spectroscopy, batch sorption studies, zeta potential measurements and surface complexation modeling (SCM) in the pH range from 5 to 10. In situ attenuated total reflection fourier-transform infrared (ATR FT-IR) spectroscopy revealed the predominant formation of a single inner-sphere surface species at the alumina surface, supporting previously reported EXAFS results, irrespective of the presence or absence of atmospherically derived carbonate. The adsorption of Se(IV) decreased with increasing pH, and no impact of the ionic strength was observed in the range from 0.01 to 0.1 mol L-1 NaCl. Inner-sphere surface complexation was also suggested from the shift of the isoelectric point of γ-Al2O3 observed during zeta potential measurements when Se(IV) concentration was 10-4 mol L-1. Based on these qualitative findings, the acid-base surface properties of γ-Al2O3 and the Se(IV) adsorption edges were successfully described using a 1-pK CD-MUSIC model, considering one bidentate surface complex based on previous EXAFS results. The results of competitive sorption experiments suggested that the surface affinity of Se(IV) toward γ-Al2O3 is higher than that of dissolved inorganic carbon (DIC). Nevertheless, from the in situ experiments, we suggest that the presence of DIC might transiently impact the migration of Se(IV) by reducing the number of available sorption sites on mineral surfaces. Consequently, this should be taken into account in predicting the environmental fate of Se(IV).
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Affiliation(s)
- Natalia Mayordomo
- CIEMAT , Department of Environment, Avenida Complutense 40, CP 28040, Madrid, Spain
| | - Harald Foerstendorf
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR) , Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Johannes Lützenkirchen
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology , Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Karsten Heim
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR) , Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Stephan Weiss
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR) , Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Ursula Alonso
- CIEMAT , Department of Environment, Avenida Complutense 40, CP 28040, Madrid, Spain
| | - Tiziana Missana
- CIEMAT , Department of Environment, Avenida Complutense 40, CP 28040, Madrid, Spain
| | - Katja Schmeide
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR) , Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Norbert Jordan
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR) , Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
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